Oxymycterus wayku, Jayat, 2008

Don E. Wilson, Russell A. Mittermeier & Thomas E. Lacher, Jr, 2017, Cricetidae, Handbook of the Mammals of the World – Volume 7 Rodents II, Barcelona: Lynx Edicions, pp. 204-535 : 467-468

538.

Ravine Hocicudo

Oxymycterus wayku

French: Hocicudo des ravins / German: Schluchten-Grabmaus / Spanish: Raton hocicudo de barranco

Taxonomy. Oxymycterus wayku Jayat et al., 2008 , “ Argentina, Province of Tucuman, | Department of Trancas, 10 km by road south of Hualinchay on the trail to Lara (26°19°20.2"S,65°36'45.527W, 2316m), This species is monotypic.

Distribution. NW Argentina (E slopes of Sierra del Aconquija and Cumbres Calchaquies ranges), Tucuman Province.

Descriptive notes. Head-body 124-144 mm, tail 77-97 mm, ear 17-21 mm, hindfoot 28-32 mm; weight 44-5— 76-5 g. See general characters of the genus under the Anazonian Hocicudo ( O. amazonicus ) account. Dorsum of the Ravine Hocicudo is blackish brown, with slight ocher or reddish hue (juvenile almost black) and dorsal hairs dark gray for most of their lengths but tips ocherous; guard hairs are completely black and extend well beyond underfur, up to 3-5 mm on rump. Sides sre similar to dorsum. Venter is paler, with ocher intermingled with ash-gray hair bases; and chin has conspicuous white spot that, in some specimens, extends onto throat. Tuft of black hairs has ocher tips immediately anterior to ear, extending posteriorly to middle of pinnae. Forefeet and hindfeet are dark gray, almost black, with digits covered by white ungual tufts that contrast sharply with darkness of body, thighs, and feet. Tail is almost completely black, only slightly paler ventrally, and densely covered by hair.

Habitat. Belt of humid slopes—ecotone between montane forest and highland grasslands—in upper limits of Yungas forests at elevations of 800-2200 m.

Food and Feeding. No information.

Breeding. One female Ravine Hocicudo had signs of reproductive activity in late April/early May; males collected in July or early spring were reproductively inactive.

Activity patterns. No information.

Movements, Home range and Social organization. No information.

Status and Conservation. Not assessed on The [UCN Red List.

Bibliography. d'Hiriart et al. (2015), Jayat, D'Elia et al. (2008), Oliveira & Goncalves (2015).

Figures

523. Huanchaca Burrowing Mouse (Juscelinomys huanchacae), 524. Candango Burrowing Mouse (Juscelinomys candango), 525. Amazonian Hocicudo (Oxymycterus amazonicus), 526. Spy Hocicudo (Oxymycterus delator), 527. Atlantic Forest Hocicudo (Oxymycterus dosytrichos), 528. Quaestor Hocicudo (Oxymycterus quaestor), 529. Inca Hocicudo (Oxymycterus inca), 530. Paramo Hocicudo (Oxymycterus paramensis), 531. Elfin Forest Hocicudo (Oxymycterus nigrifrons), 532. Upper Yungas Inca Hocicudo (Oxymycterus juliacae), 533. Small Yungas Hocicudo (Oxymycterus hiska), 534. Quechuan Hocicudo (Oxymycterus hucucha), 535. Mount Caparao Hocicudo (Oxymycterus caparoae), 536. Red Hocicudo (Oxymycterus rufus), 537. Darwin’s Hocicudo (Oxymycterus nasutus), 538. Ravine Hocicudo (Oxymycterus wayku), 539. Cook’s Hocicudo (Oxymycterus joser), 540. Common Cerrado Mouse (Thalpomys cerradensis), 541. Hairy-eared Cerrado Mouse (Thalpomys lasiotis), 542. Roraima Mouse (Podoxymys roraimae), 543. Blackish Grass Mouse (Thaptomys nigrita), 544. Ecuadorean Akodont (Necromys punctulatus), 545. Northern Akodont (Necromys urichi), 546. Hairy-tailled Akodont (Necromys lasiurus), 547. Pleasant Akodont (Necromys amoenus), 548. White-chinned Akodont (Necromys lactens), 549. Lillo’s Akodont (Necromys lilloi), 550. Dark-furred Akodont (Necromys obscurus), 551. Kemp's Grass Mouse (Deltamys kempi), 552. Araucaria Grass Mouse (Deltamys araucaria), 553. Serra do Mar Grass Mouse (Castoria angustidens)

Distribution. NW Argentina (E slopes of Sierra del Aconquija and Cumbres Calchaquies ranges), Tucuman Province.